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Display
21.5-inch (diagonal) LED-backlit display with IPS technology
1920-by-1080 resolution with support for millions of colors
Processor
2.7GHz
2.7GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.2GHz) with 6MB L3 cache
2.9GHz
2.9GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache
Configurable to 3.1GHz quad-core Intel Core i7 (Turbo Boost up to 3.9GHz).
Memory
8GB (two 4GB) of 1600MHz DDR3 memory
Configurable to 16GB.
Storage
2.7GHz
1TB (5400-rpm) hard drive
2.9GHz
1TB (5400-rpm) hard drive
Configurable to 1TB Fusion Drive.
Graphics
2.7GHz
NVIDIA GeForce GT 640M graphics processor with 2 gb of GDDR5 memory
2.9GHz
Video Support and Camera
FaceTime HD camera
Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display
Support for extended desktop and video mirroring modes
Audio
Stereo speakers
Dual microphones
Headphone port
Headphone/optical digital audio output (minijack)
Support for Apple iPhone headset with microphone
Connections and Expansion
SDXC card slot
Four USB 3 ports
Two Thunderbolt ports
Mini DisplayPort output with support for DVI, VGA, and dual-link DVI (adapters sold separately)
10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)
Input
Apple Wireless Keyboard
Full-size keyboard with 78 (U.S.) or 79 (ISO) keys, including 12 function keys, 4 arrow keys (inverted “T” arrangement)
Magic Mouse
Smooth, seamless Multi-Touch surface with support for simple gestures (scrolling and swiping). Click and double-click anywhere. Ambidextrous construction accommodates left- and right-handed users.
Magic Trackpad
Glass Multi-Touch trackpad for precise cursor control; supports inertial scrolling, pinch and expand, swipe, three-finger swipe, four-finger swipe, tap, double-tap, rotate, screen zoom, scroll, click and drag, click drag and lock, secondary click A and B.
Wireless
Wi-Fi
802.11n Wi-Fi wireless networking;2 IEEE 802.11a/b/g compatible
Bluetooth
Bluetooth 4.0 wireless technology
Included Software
OS X Mountain Lion